From the article, this is powered by a partnership with Cloudflare. It's worth noting that until August 6 of this year, Cloudflare's WARP VPN would leak your IP address - but only to sites using the Cloudflare network.
Microsoft's initial announcement for the feature touted that IP addresses would be masked, and one imagines that they did their diligence with Cloudflare and are enforcing the strong practices that WARP has now rolled out more broadly.
But it's worth noting that you're routing through a company to whom the words "still private" encompassed leaking client IP address information to Cloudflare's hosting customers as recently as two months ago.
https://web.archive.org/web/20220609160341/https://developer...
And when Cloudflare released their new SOPs for Warp, they did so in a blog post titled "More features, still private" - https://blog.cloudflare.com/geoexit-improving-warp-user-expe... as referenced in https://developers.cloudflare.com/warp-client/known-issues-a...
Microsoft's initial announcement for the feature touted that IP addresses would be masked, and one imagines that they did their diligence with Cloudflare and are enforcing the strong practices that WARP has now rolled out more broadly.
But it's worth noting that you're routing through a company to whom the words "still private" encompassed leaking client IP address information to Cloudflare's hosting customers as recently as two months ago.